inputsource.hpp

基于属性证书的访问控制源代码,由c++编写,包括openssl,xercesc等

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999-2000 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache\@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation, and was
 * originally based on software copyright (c) 1999, International
 * Business Machines, Inc., http://www.ibm.com .  For more information
 * on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

/*
 * $Log: InputSource.hpp,v $
 * Revision 1.11  2003/12/17 00:18:35  cargilld
 * Update to memory management so that the static memory manager (one used to call Initialize) is only for static data.
 *
 * Revision 1.10  2003/12/01 23:23:26  neilg
 * fix for bug 25118; thanks to Jeroen Witmond
 *
 * Revision 1.9  2003/11/17 10:52:15  amassari
 * Fixed documentation bug#24746
 *
 * Revision 1.8  2003/05/30 16:11:45  gareth
 * Fixes so we compile under VC7.1. Patch by Alberto Massari.
 *
 * Revision 1.7  2003/05/16 21:36:59  knoaman
 * Memory manager implementation: Modify constructors to pass in the memory manager.
 *
 * Revision 1.6  2003/05/15 18:27:05  knoaman
 * Partial implementation of the configurable memory manager.
 *
 * Revision 1.5  2003/03/07 18:10:06  tng
 * Return a reference instead of void for operator=
 *
 * Revision 1.4  2002/11/04 14:56:26  tng
 * C++ Namespace Support.
 *
 * Revision 1.3  2002/09/30 18:26:18  tng
 * Since the derived class Wrapper4DOMInputSource has overwritten the set/getEncoding, SystemId, PublicId ... etc., these functions has to be virtual for them to work.
 *
 * Revision 1.2  2002/02/20 18:17:01  tng
 * [Bug 5977] Warnings on generating apiDocs.
 *
 * Revision 1.1.1.1  2002/02/01 22:22:08  peiyongz
 * sane_include
 *
 * Revision 1.10  2001/11/21 16:14:32  tng
 * Schema: New method InputSource::get/setIssueFatalErrorIfNotFound to tell the parser whether to issue fatal error or not if cannot find it (the InputSource).  This is required for schema processing as it shouldn't be a fatal error if the schema is not found.
 *
 * Revision 1.9  2000/03/02 19:54:35  roddey
 * This checkin includes many changes done while waiting for the
 * 1.1.0 code to be finished. I can't list them all here, but a list is
 * available elsewhere.
 *
 * Revision 1.8  2000/02/24 20:12:55  abagchi
 * Swat for removing Log from API docs
 *
 * Revision 1.7  2000/02/12 03:42:21  rahulj
 * Fixed DOC++ documentation formatting errors.
 *
 * Revision 1.6  2000/02/12 03:31:55  rahulj
 * Removed duplicate CVS Log entries.
 *
 * Revision 1.5  2000/02/12 01:27:19  aruna1
 * Documentation updated
 *
 * Revision 1.4  2000/02/09 02:15:28  abagchi
 * Documented destructor
 *
 * Revision 1.3  2000/02/06 07:47:58  rahulj
 * Year 2K copyright swat.
 *
 * Revision 1.2  2000/01/12 00:15:39  roddey
 * Changes to deal with multiply nested, relative pathed, entities and to deal
 * with the new URL class changes.
 *
 * Revision 1.1.1.1  1999/11/09 01:07:46  twl
 * Initial checkin
 *
 * Revision 1.2  1999/11/08 20:45:01  rahul
 * Swat for adding in Product name and CVS comment log variable.
 *
 */


#ifndef INPUTSOURCE_HPP
#define INPUTSOURCE_HPP

#include <xercesc/util/PlatformUtils.hpp>

XERCES_CPP_NAMESPACE_BEGIN

class BinInputStream;


/**
  * A single input source for an XML entity.
  *
  * <p>This class encapsulates information about an input source in a
  * single object, which may include a public identifier or a system
  * identifier</p>
  *
  * <p>There are two places that the application will deliver this input
  * source to the parser: as the argument to the Parser::parse method, or as
  * the return value of the EntityResolver::resolveEntity method.</p>
  *
  * <p>InputSource is never used directly, but is the base class for a number
  * of derived classes for particular types of input sources. Derivatives are
  * provided (in the framework/ directory) for URL input sources, memory buffer
  * input sources, and so on.</p>
  *
  * <p>When it is time to parse the input described by an input source, it
  * will be asked to create a binary stream for that source. That stream will
  * be used to input the data of the source. The derived class provides the
  * implementation of the makeStream() method, and provides a type of stream
  * of the correct type for the input source it represents.
  *
  * <p>An InputSource object belongs to the application: the parser never
  * modifies them in any way. They are always passed by const reference so
  * the parser will make a copy of any input sources that it must keep
  * around beyond the call.</p>
  *
  * @see Parser#parse
  * @see EntityResolver#resolveEntity
  */
class SAX_EXPORT InputSource : public XMemory
{
public:
    // -----------------------------------------------------------------------
    //  All constructors are hidden, just the destructor is available
    // -----------------------------------------------------------------------
    /** @name Destructor */
    //@{
  /**
    * Destructor
    *
    */
    virtual ~InputSource();
    //@}


    // -----------------------------------------------------------------------
    /** @name Virtual input source interface */
    //@{
  /**
    * Makes the byte stream for this input source.
    *
    * <p>The derived class must create and return a binary input stream of an
    * appropriate type for its kind of data source. The returned stream must
    * be dynamically allocated and becomes the parser's property.
    * </p>
    *
    * @see BinInputStream
    */
    virtual BinInputStream* makeStream() const = 0;

    //@}


    // -----------------------------------------------------------------------
    /** @name Getter methods */
    //@{
  /**
    * An input source can be set to force the parser to assume a particular
    * encoding for the data that input source reprsents, via the setEncoding()
    * method. This method returns name of the encoding that is to be forced.
    * If the encoding has never been forced, it returns a null pointer.
    *
    * @return The forced encoding, or null if none was supplied.
    * @see #setEncoding
    */
    virtual const XMLCh* getEncoding() const;


  /**
    * Get the public identifier for this input source.
    *
    * @return The public identifier, or null if none was supplied.
    * @see #setPublicId